Intelligent double-layer folding microfiltration machine and microfiltration method

Abstract

The invention discloses an intelligent double-layer folding microfilter and a microfiltration method, a filter system adopts a unique inner and outer double-layer filter screen frame design, the outer filter screen frame can be radially unfolded or folded relative to the inner filter screen frame, and the double-layer filter screen can be independently used and can be folded in a specific environment for double-layer filtration; and the effective filtering area is obviously increased. And the driving system accurately controls the rotation and folding actions of the filter screen through a motor, a gear set and a gear shifting mechanism. And the backwashing system efficiently cleans the filter screen by using a high-pressure water pump, a water pipe and a nozzle. The intelligent control system integrates a liquid level sensor and a turbidity sensor and can automatically adjust the operation mode of the filter screen according to the water quality condition. And a submerged ultraviolet germicidal lamp is arranged at the bottom and is used for sterilizing and disinfecting filtered water and the surface of the filter screen. The problems that a filter screen is easy to block, inconvenient to clean, low in automation degree and the like due to sudden increase of pollutants in the feeding stage of a traditional micro-filter are solved, and the micro-filter has the advantages of being high in filtering efficiency and saving water and energy.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a precision filtration device for removing suspended particulate matter from water, specifically an intelligent double-layer pleated microfilter and microfiltration method. Background Technology

[0002] A microfiltration system is a mechanical filtration device widely used in solid-liquid separation processes in aquaculture, wastewater treatment, industrial circulating water, and food processing. Its core principle involves a rotating drum-type filter screen. Water flows through the screen, and suspended solids larger than the mesh size are trapped on the inner wall, while the filtered water flows out. However, as filtration continues, especially during feeding when fish excrement and feed residue surge, the trapped impurities gradually clog the filter screen, leading to decreased filtration efficiency and increased water consumption.

[0003] Existing microfiltration machines primarily use a backwashing assembly with a high-pressure water pump and nozzles to continuously or intermittently flush the rotating filter screen to remove blockages. While this method addresses the issue of cleaning without shutting down the machine to some extent, it still has several limitations: Fixed filter mesh size: The mesh size of traditional rotary drum filters cannot be changed. During the feeding phase, the increase in large particulate contaminants leads to frequent clogging of the filter screen, affecting filtration efficiency. Energy and water consumption: Backwashing requires continuous consumption of high-pressure water and electricity. If the cleaning frequency is not set properly, it will result in water waste. Limited automation: Most equipment requires manual judgment of cleaning timing and duration based on experience, failing to achieve truly intelligent and adaptive operation.

[0004] Frequent clogging of the filter screens leads to repeated backwashing of the backwashing system, resulting in excessive waste of water and electricity, which in turn increases the cost of factory farming. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an intelligent double-layer pleated microfilter and microfiltration method. This invention adopts a double-layer pleated filter design, which realizes controllable change of filter mesh size and efficient self-cleaning. Combined with an intelligent sensing and control system, it achieves fully automatic, efficient and energy-saving operation.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] An intelligent double-layer pleated microfiltration machine includes a frame and housing assembly, a drive system, a filtration system, a backwashing system, a sewage discharge system, an intelligent control system, and a sterilization system; the frame and housing assembly supports the drive system, filtration system, backwashing system, sewage discharge system, intelligent control system, and sterilization system. The frame and housing assembly includes an integral frame, a drive motor bracket, a frame plate, a rear plate, front support wheels, and a rear support base; The drive system includes a drive motor, a shift motor, an inner filter gear, an outer filter gear, and a shift crank, which are used to provide power and control the operating mode of the filtration system; The filtration system includes an inner filter frame and an outer filter frame that can rotate relative to each other, as well as a filter sheet support frame laid on the inner filter frame and the outer filter frame; the outer filter frame can be radially expanded or folded relative to the inner filter frame under the control of a drive system. The backwashing system includes a high-pressure water pump, high-pressure water pipes, and high-pressure nozzles, used to clean the filtration system with high-pressure water. The sewage system includes a sludge collection tank and a drain outlet, used to collect and discharge the sewage that has been flushed out; The intelligent control system includes a control box, a turbidity sensor, and a level sensor, which are used to receive sensor signals and automatically control the operation of the drive system and the backwashing system. The sterilization system includes ultraviolet germicidal lamps and lamp connectors, which are used to perform preliminary sterilization and disinfection on the filtered water and the surface of the filter screen.

[0008] In the above scheme, the front support wheel and the rear support seat are used to support and guide the rotation of the inner filter screen frame, and the front baffle and the rear support wheel are used to support and seal the outer filter screen frame.

[0009] In the above scheme, the shift motor drives the shift crank, crank slider groove and connecting rod to drive the drive gear mounted on the guide spline, which can selectively mesh with the inner filter screen gear and / or the outer filter screen gear to achieve synchronous rotation filtration or backwashing.

[0010] In the above scheme, the shifting mechanism includes a gear baffle, a crank slider groove, and a connecting rod; there are two connecting rods, one end of which is provided with a gear baffle, and the other end is provided on the extension rod of the crank slider groove. The two connecting rods are arranged in parallel, and a drive gear is provided between the two gear baffles; a crank slider is provided in the crank slider groove, and the crank slider is located at the output end of the shifting crank.

[0011] In the above scheme, the inner filter frame and the outer filter frame are integral with the inner filter gear and the outer filter gear, respectively, and the filter screen support frame is fixed to the inner filter frame and the outer filter frame by bolts.

[0012] In the above scheme, the filter screen support frame is equipped with an inner filter screen and an outer filter screen respectively, corresponding to the inner filter screen frame and the outer filter screen frame. The inner filter screen and the outer filter screen adopt a filtration mesh of 100 mesh and 200 mesh respectively.

[0013] In the above scheme, the high-pressure nozzle is arranged on the outside of the inner filter screen frame and the outer filter screen frame. The high-pressure water pump delivers clean water through the high-pressure water pipe to the inner filter screen and the outer filter screen via the high-pressure nozzle.

[0014] In the above scheme, the turbidity sensor and the liquid level sensor monitor the quality of the filtered water and the clogging of the filter screen in real time. When the liquid level exceeds the preset threshold, the control system automatically starts the backwashing program. According to the change of turbidity, the control system automatically changes the filtration mode.

[0015] In the above scheme, the ultraviolet lamp tube is arranged along the axial direction of the inner filter frame and the outer filter frame, and at the same time disinfects the filtered water and the filter surface; and is fixed on the ultraviolet lamp tube holder.

[0016] A control method based on an intelligent double-layer pleated microfilter includes the following modes: Single internal / external filter mode: The drive gear meshes with the internal filter screen gear or the external filter screen gear, turning the individual internal filter screen frame or external filter screen frame to the position where the notch of one internal filter screen frame or external filter screen frame faces upward and the notch of the other internal filter screen frame or external filter screen frame faces downward. In single filter screen mode, the nozzle can clean the internal filter screen individually through the notch. Dual-layer filter mode: The notches in either the inner or outer filter frame are facing upwards; Backwashing mode: The high-pressure water pump starts, and high-pressure water is sprayed out through the nozzle to clean the inner and outer filter screens on the inner and outer filter screen frames; the backwashing mode can be performed simultaneously with the filtration mode. Beneficial effects

[0017] Variable filtration area and filter mesh size significantly improve efficiency: Through the double-layer filter design, different mesh sizes of filters can be replaced in single-layer filter mode without increasing the radial size of the equipment, reducing filter clogging; in double-layer filter mode, the filtration effect is effectively improved, significantly increasing the processing capacity per unit area.

[0018] 2. Self-cleaning ability: The unique folding function generates mechanical shearing force, which can effectively remove sticky contaminants that are difficult to remove by conventional water flushing, greatly reducing the risk of complete filter clogging and the frequency of manual cleaning.

[0019] 3. Intelligent operation, water and energy saving: The intelligent control system based on turbidity feedback can change the filter screen in a timely manner, making the cleaning behavior "as needed". This avoids the waste of water and electricity caused by fixed interval rinsing and frequent rinsing, and achieves the best balance between high efficiency and energy saving.

[0020] 4. Reliable operation and easy filter replacement: The filter adopts a modular design, and individual filter pieces can be replaced if there is partial damage, which improves maintenance efficiency and reduces long-term maintenance costs. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of the intelligent double-layer pleated microfiltration machine provided in an embodiment of the present invention. Figure 1 ; Figure 2 A three-dimensional structural diagram of the intelligent double-layer pleated microfiltration machine provided in an embodiment of the present invention. Figure 2 ; Figure 3 A side view of an intelligent double-layer pleated microfiltration machine provided in an embodiment of the present invention; Figure 4 The structural relationship between the inner and outer filter frames; Figure 5 This is a diagram of the support frame for a single filter screen on the filter screen frame. The frame is equipped with a stainless steel filter screen that is fixed by pipe clamps and bolts, but it is not shown in the diagram. Figure 6 This is a schematic diagram of the meshing structure of the internal filter gear, drive gear, and shifting structure in an embodiment of the present invention. Figure 7 This is a schematic diagram of the gear shifting mechanism; Figure 8 This is a schematic diagram of the intelligent control system provided in an embodiment of the present invention.

[0022] Figure label: 1-Frame; 2-High-pressure water pipe; 3-Inner filter screen frame; 4-Outer filter screen frame; 5-Filter screen support frame; 6-Front baffle; 7-Rear support seat; 8-Rear support wheel; 9-High-pressure water pump; 10-Liquid level sensor; 11-Outer filter screen gear; 12-Inner filter screen gear; 13-Drive gear; 14-Guide spline; 15-Gear baffle; 16-Shift crank; 17-Shift motor; 19-Drive motor; 20-Drain outlet; 21-Front support wheel; 22-Control box; 23-Turbidity sensor; 24-Frame plate; 25-Drive motor bracket; 26-Sludge collection tank; 28-High-pressure nozzle; 29-Rear plate; 30-Ultraviolet germicidal lamp; 31-Lamp connecting seat; 41-Connecting rod; 42-Crank slider groove. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Combined with appendix Figures 1 to 8 As shown, the present invention provides an intelligent double-layer folded microfiltration machine. The frame 1 is welded from corrosion-resistant aluminum alloy profiles, possessing sufficient rigidity and stability to support all internal components. The frame plate 24 and the rear plate 29 together constitute the main outer shell of the equipment.

[0027] An intelligent double-layer pleated microfiltration machine includes a frame and housing assembly, a drive system, a filtration system, a backwashing system, a sewage discharge system, an intelligent control system, and a sterilization system; the frame and housing assembly supports the drive system, filtration system, backwashing system, sewage discharge system, intelligent control system, and sterilization system. The frame and housing assembly includes an integral frame 1, a drive motor bracket 25, a frame plate 24, a rear plate 29, a front support wheel 21, and a rear support base 7; The drive system includes a drive motor 19, a shift motor 17, an inner filter gear 12, an outer filter gear 11, a shift crank 16, a crank slider groove 42, and a connecting rod 41, which are used to provide power and control the operating mode of the filtration system. The filtration system includes an inner filter frame 3 and an outer filter frame 4 that can rotate relative to each other, and a filter sheet support frame 5 laid on the inner filter frame 3 and the outer filter frame 4; the outer filter frame 4 can be radially expanded or folded relative to the inner filter frame 3 under the control of the drive system. The backwashing system includes a high-pressure water pump 9, a high-pressure water pipe 2, and a high-pressure nozzle 28, which are used to clean the filtration system with high-pressure water. The sewage system includes a sludge collection tank 26 and a sewage outlet 20 for collecting and discharging the sewage washed off; The intelligent control system includes a control box 22, a turbidity sensor 23, and a liquid level sensor 10, which are used to receive sensor signals and automatically control the operation of the drive system and the backwashing system. The sterilization system includes an ultraviolet germicidal lamp 30 and a lamp connector 31, which are used to perform preliminary sterilization and disinfection on the filtered water and the surface of the filter screen.

[0028] The front support wheel 21 and the rear support seat 7 are used to support and guide the rotation of the inner filter frame 3, and the front baffle plate 6 and the rear support wheel 8 are used to support and seal the outer filter frame 4.

[0029] The shifting mechanism of this invention includes a gear baffle 15, a crank slider groove 42, and a connecting rod 41. There are two connecting rods 41, one end of which is provided with a gear baffle 15, and the other end is provided on the extension rod of the crank slider groove 42. The two connecting rods 41 are arranged in parallel, and a drive gear 13 is provided between the two gear baffles 15. A crank slider is provided in the crank slider groove 42, and the crank slider is located at the output end of the shifting crank 16.

[0030] The shift motor 17 drives the shift crank 16, the crank slider groove 42 and the connecting rod 41, thereby driving the drive gear 13 mounted on the guide spline 14 to selectively mesh with the inner filter screen gear 12 or / and the outer filter screen gear 11 to achieve synchronous rotation filtration or backwashing.

[0031] The inner filter frame 3 and the outer filter frame 4 are integral with the inner filter gear 12 and the outer filter gear 11, respectively, and the filter screen support frame 5 is fixed to the inner filter frame 3 and the outer filter frame 4 by bolts.

[0032] The filter support frame 5 is equipped with an inner filter and an outer filter, respectively, corresponding to the inner filter frame 3 and the outer filter frame 4. The inner filter and the outer filter adopt a filtration mesh of 100 mesh and 200 mesh, respectively.

[0033] The high-pressure nozzle 28 is arranged on the outside of the inner filter screen frame 3 and the outer filter screen frame 4. The high-pressure water pump 9 delivers clean water through the high-pressure water pipe 27 from the high-pressure nozzle to the inner and outer filter screens.

[0034] The turbidity sensor 23 and the liquid level sensor 10 monitor the filtered water quality and filter screen clogging in real time. When the liquid level exceeds the preset threshold, the control system automatically starts the backwashing program. The control system automatically changes the filtration mode according to the turbidity change.

[0035] The ultraviolet lamp tube 30 is arranged along the axial direction of the inner filter frame 3 and the outer filter frame 4, and disinfects the filtered water and the filter surface at the same time; and is fixed on the ultraviolet lamp tube holder 31.

[0036] Installation and structure of the filtration system: The filtration system is the core of this invention. The inner filter frame 3 and the outer filter frame 4 are made of stainless steel tubing and are coaxially mounted via a support assembly, allowing for circumferential "unfolded" and "folded" switching. The filter support frame 5 is detachably mounted on the inner and outer filter frames using bolts, and a clamp is used to tighten and secure the stainless steel filter sheets. Specifically, the inner filter is preferably 100 mesh, used to intercept larger particulate impurities; the outer filter is preferably 200 mesh, used for fine filtration. This split-type filter design facilitates individual replacement in case of partial damage, greatly reducing maintenance costs.

[0037] The working process of the drive system: The drive system is key to achieving mode switching. The drive motor 19 transmits power to the guide spline 14. A drive gear 13 is mounted on the shaft of the guide spline 14. The shift motor 17 precisely drives the shift crank 16, the crank slider groove 42, and the connecting rod 41 according to the instructions of the control box 22, thereby changing the axial position of the drive gear 13 by pushing both sides of the gear baffle 15.

[0038] It has three working states: Single filter mode: When the inner filter (100 mesh) needs to be used alone, suitable for situations with high pollutant loads, such as after feeding, the shifting mechanism engages the drive gear 15 with the inner filter gear 12 fixed on the inner filter frame 3. At this time, the power drives the inner filter frame 3 to rotate to the working position with its guide notch facing upwards, meaning the effective filtration surface of the filter is below the equipment, while the outer filter frame 4 is locked in the non-working position with its guide notch facing downwards, i.e., above the equipment, by the control system. Conversely, when the outer filter (200 mesh) needs to be used alone for routine water quality maintenance, the drive gear 15 engages with the outer filter gear 11, driving the outer filter frame 3 to rotate to the working position, while the inner filter frame 3 is locked in the non-working position.

[0039] Dual-screen mode: When extremely high water quality requirements are met, the control system instructs the shifting mechanism to align the guide notches of both the inner and outer filter frames, placing them together in the lower filtration area. The wastewater to be treated first flows through the outer 200-mesh filter for fine filtration, and then through the inner 100-mesh filter for further water quality assurance, achieving staged filtration and significantly improving the quality of the filtered water.

[0040] Backwashing mode: When cleaning the outer filter screen, first move the inner filter screen to the working position with the notch facing upwards, forming a barrier on its surface. Then, start the high-pressure water pump 9, and high-pressure water flows through the high-pressure water pipe 27 and the high-pressure nozzle 28 to rinse the outer surface of the outer filter screen. When cleaning the inner filter screen, first move the outer filter screen to the working position. The guide notch on its frame provides a cleaning channel for the high-pressure nozzle to reach the inner surface of the inner filter screen directly, allowing high-pressure water to efficiently rinse the inner filter screen through this notch.

[0041] Support and sealing: To ensure the stability and sealing of the inner and outer filter frames during relative movement, the equipment is equipped with multiple sets of support structures. The front support wheel 21 and the rear support base 7 jointly support and guide the rotation of the inner filter frame 3. The front baffle plate 6 and the rear support wheel 8 are used to support and seal the outer filter frame 4. The connection between the two filter frames uses a figure-nine rubber sealing ring to ensure that they do not interfere with each other during operation and effectively prevent short circuits in the water flow.

[0042] Backwashing and sewage system: The high-pressure water pump 9 of the backwashing system draws water from an external water source to ensure cleanliness and prevent nozzle clogging. The high-pressure nozzles 28 on the high-pressure water pipe 2 are arranged at equal intervals of 110mm to ensure thorough rinsing. The flushed debris falls into a sludge collection tank 26 installed at a 1° angle below, which facilitates wastewater collection and eventual discharge through the drain outlet 20. The sludge collection tank 26 features a modular assembly design for easy transportation and installation.

[0043] Intelligent control process: The intelligent control system is the "brain" of the entire device. Its core is the microprocessor system within the control box 22. The level sensor 10 monitors the water level inside the microfilter in real time; if the water level exceeds a preset safety value, an alarm is immediately triggered, and backwashing may be initiated. The turbidity sensor 23 continuously monitors the turbidity value of the filtered water.

[0044] During non-feeding periods, when water pollutants are low, the system defaults to or automatically operates in "external filter-only mode" based on turbidity levels, minimizing filter clogging while maintaining water quality. Once feeding begins, fish excrement and uneaten food increase dramatically, causing water turbidity to rise. When turbidity exceeds the first set threshold while the water level remains within the normal range, the control system anticipates increased filter clogging risk and automatically switches to "internal filter-only mode," utilizing its larger mesh size to handle the sudden increase in larger particulate pollutants and prevent rapid clogging. After feeding, as the water gradually clarifies, turbidity levels continue to decrease. When turbidity falls below the second set threshold and then below the first, indicating stable water quality, the system automatically switches back to "external filter-only mode" for fine filtration. For advanced filtration, a pre-programmed "dual-filter mode" can be activated for powerful purification. The entire mode switching and backwashing process is fully automated, achieving "on-demand filtration" and "on-demand cleaning," maximizing water and energy savings.

[0045] Sterilization system: In the filtered clean water area, a submersible ultraviolet germicidal lamp 30 is installed along the axial direction of the equipment, and the lamp is fixed by a lamp connector 31. This sterilization system can simultaneously and continuously irradiate the filtered clean water and the surface of the filter screen rotating through this area, effectively killing bacteria and algae, inhibiting the formation of biofilm, and realizing the integration of filtration and disinfection.

[0046] In summary, this invention effectively solves the problems of easy clogging, inconvenient cleaning, and high energy consumption faced by traditional microfilters in dealing with water quality fluctuations, especially during the feeding period, through the innovative combination of mechanical structure and intelligent control. It is particularly suitable for application scenarios with high requirements for water quality stability, such as factory-scale recirculating aquaculture.

[0047] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An intelligent double-layer pleated microfiltration machine, characterized in that, It includes a frame and housing assembly, a drive system, a filtration system, a backwashing system, a sewage discharge system, an intelligent control system, and a sterilization system; the frame and housing assembly is used to support the drive system, filtration system, backwashing system, sewage discharge system, intelligent control system, and sterilization system; The frame and housing assembly includes an integral frame (1), a drive motor bracket (25), a frame plate (24), a rear plate (29), a front support wheel (21), and a rear support base (7); the drive system includes a drive motor (19), a shift motor (17), an inner filter screen gear (12), an outer filter screen gear (11), and a shift crank (16) for providing power and controlling the operating mode of the filtration system; the filtration system includes a relatively rotatable inner filter screen frame (3) and an outer filter screen frame (4), and a filter screen support frame (5) laid on the inner filter screen frame (3) and the outer filter screen frame (4); the outer filter screen frame (4) can be controlled by the drive system relative to the inner filter screen frame (3). The filter screen frame (3) is radially expanded or folded; the backwashing system includes a high-pressure water pump (9), a high-pressure water pipe (2) and a high-pressure nozzle (28) for high-pressure water cleaning of the filtration system; the sewage system includes a sludge collection tank (26) and a sewage outlet (20) for collecting and discharging the flushed dirt; the intelligent control system includes a control box (22), a turbidity sensor (23) and a liquid level sensor (10) for receiving sensor signals and automatically controlling the operation of the drive system and the backwashing system; the sterilization system includes an ultraviolet germicidal lamp tube (30) and a lamp tube connector (31) for preliminary sterilization and disinfection of the filtered water and the surface of the filter screen.

2. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The front support wheel (21) and the rear support seat (7) are used to support and guide the rotation of the inner filter frame (3), and the front baffle (6) and the rear support wheel (8) are used to support and seal the outer filter frame (4).

3. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The shift motor (17) drives the drive gear (13) mounted on the guide spline (14) by driving the shift crank (16), the crank slider groove (42) and the connecting rod (41). The drive gear (13) can selectively mesh with the inner filter gear (12) or / and the outer filter gear (11) to achieve synchronous rotation filtration or backwashing.

4. The intelligent double-layer pleated microfiltration machine according to claim 3, characterized in that, The shifting mechanism includes a gear baffle (15), a crank slider groove (42), and a connecting rod (41); there are two connecting rods (41), one end of which is provided with a gear baffle (15), and the other end is provided on the extension rod of the crank slider groove (42). The two connecting rods (41) are arranged in parallel, and a drive gear (13) is provided between the two gear baffles (15); a crank slider is provided in the crank slider groove (42), and the crank slider is located at the output end of the shifting crank (16).

5. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The inner filter frame (3) and the outer filter frame (4) are integral with the inner filter gear (12) and the outer filter gear (11), respectively. The filter support frame (5) is fixed to the inner filter frame (3) and the outer filter frame (4) by bolts.

6. The intelligent double-layer pleated microfiltration machine according to claim 5, characterized in that, The filter support frame (5) is equipped with an inner filter and an outer filter, respectively, corresponding to the inner filter frame (3) and the outer filter frame (4). The inner filter and the outer filter adopt a filtration mesh of 100 mesh and 200 mesh, respectively.

7. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The high-pressure nozzle (28) is arranged on the outside of the inner filter screen frame (3) and the outer filter screen frame (4). The high-pressure water pump (9) delivers clean water through the high-pressure water pipe (2) to the inner and outer filter screens.

8. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The turbidity sensor (23) and the liquid level sensor (10) monitor the quality of the filtered water and the clogging of the filter screen in real time. When the liquid level exceeds the preset threshold, the intelligent control system automatically starts the backwashing program. According to the change of turbidity, the intelligent control system automatically changes the filtration mode.

9. The intelligent double-layer pleated microfiltration machine according to claim 1, characterized in that, The ultraviolet lamp tube (30) is arranged in the axial direction of the inner filter frame (3) and the outer filter frame (4), and disinfects the filtered water and the filter surface at the same time; and is fixed on the ultraviolet lamp tube seat (31).

10. A control method for an intelligent double-layer pleated microfilter based on claims 1-8, characterized in that, Includes the following modes: Single internal / external filter mode: The drive gear (15) meshes with the internal filter screen gear (12) or the external filter screen gear (11) to rotate the individual internal filter screen frame (3) or external filter screen frame (4) to the position where the notch of one internal filter screen frame (3) or external filter screen frame (4) faces upward and the notch of the other internal filter screen frame (3) or external filter screen frame (4) faces downward. In single filter mode, the nozzle (28) can clean the internal filter screen individually through the notch. Dual-layer filter mode: The notches of the inner filter frame (3) or the outer filter frame (4) are both facing upwards; Backwashing mode: The high-pressure water pump (9) is started, and high-pressure water is sprayed out through the nozzle (28) to clean the inner filter screen and outer filter screen on the inner filter screen frame (3) and the outer filter screen frame (4); the backwashing mode can be carried out simultaneously with the filtration mode.

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